by a fraction


Senior Member
Japanese - Japan
What does 'drop by a fraction' mean?

Malfoy did not speak. His mouth was open, his wand hand still
trembling. Harry thought he saw it drop by a fraction —.
  • entangledbank

    Senior Member
    English - South-East England
    He dropped his hand a small amount: he lowered it. (He dropped his wand hand = the hand with which he was holding his wand.) If Malfoy dropped his wand, he wouldn't be able to drop it by a small amount.
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